CN115890939A - Wire cutting device and wire cutting method - Google Patents

Abstract

The invention discloses a linear cutting device and a linear cutting method, wherein the linear cutting device comprises a supporting component, a cutting component and a cutting platform, wherein the supporting component comprises a base and a rack arranged on the base; the cutting assembly comprises a cutting wheel set; the cutting platform is used for connecting a workpiece, and the workpiece can rotate around the axis of the workpiece; wherein, the cutting line is connected with the negative pole of the power supply to form a tool electrode; the workpiece is connected with the positive electrode of the power supply to form a workpiece electrode; when rotary cutting is needed, the workpiece is controlled to rotate automatically, and rotary cutting is formed between the cutting line and the workpiece; when the charged cutting is required, controlling a power supply to be started, and forming charged cutting between the cutting line and the workpiece; the electro-discharge machining is beneficial to realizing the abrasive particle self-sharpening of the electroplated diamond wire, so that more abrasive particles participate in cutting, the continuous sharpness is kept, and the electro-discharge machining is beneficial to improving the cutting line bow and improving the machining precision; in addition, the rotary cutting method is beneficial to reducing the cutting force of unit materials and improving the machining precision.

Description

Wire cutting device and wire cutting method

Technical Field

The invention belongs to the technical field of processing equipment, and particularly relates to a linear cutting device and a linear cutting method.

Background

The wire cutting technology is an advanced processing technology at present, has the advantages of high efficiency, high productivity, high precision and the like compared with the traditional knife saw blade, grinding wheel and internal circle cutting, and has the principle that a workpiece to be processed is rubbed by a cutting wire moving at a high speed so as to achieve the purpose of cutting.

Traditional cutting technique is through single mechanical system mostly, through the coping saw that the line of cut formed in the frame, to the silicon rod etc. treat the cutting member and carry out the straight line cutting, this kind of cutting mode, the cutting off efficiency of the cutting member of treating of silicon rod etc. is lower, and forms the line of cut bow easily, forms the line mark on the cutting plane, and the finishing degree of cutting plane is limited, and the finished product quality after the cutting is relatively poor, still needs follow-up further finishing, and the processing cost is higher.

Disclosure of Invention

The invention aims to provide a linear cutting device and a linear cutting method, and aims to solve the problems that in the prior art, a single processing mode causes poor finished product quality, low processing precision, further finishing treatment, high processing cost and the like.

In order to realize the purpose of the invention, the invention adopts the following technical scheme to realize:

in one aspect, the present invention provides a wire cutting apparatus comprising:

the supporting component comprises a base and a rack arranged on the base, and an avoidance port is formed in the rack;

the cutting assembly is connected to the base and comprises a rack and a cutting wheel set for winding a cutting line to cut a workpiece, and the cutting wheel set is rotatably connected to one side of the rack;

the cutting platform is used for connecting a workpiece, and a rotary driving piece is further arranged on the cutting platform and used for driving the workpiece to rotate around the axis of the workpiece;

wherein the cutting line is connected with the negative pole of a power supply to form a tool electrode; the workpiece is connected with the positive electrode of the power supply to form a workpiece electrode;

when rotary cutting is needed, the workpiece is controlled to rotate automatically, and rotary cutting is formed between the cutting line and the workpiece; and/or

When the electrified cutting is needed, the power supply is controlled to be turned on, and the electrified cutting is formed between the cutting line and the workpiece.

In some embodiments of the present application, the negative power supply is connected to the cutting wheel set, and the cutting wire is wound around the cutting wheel set to form a tool electrode.

In some embodiments of the present application, a conductive block is formed on the frame, the conductive block is connected to the negative electrode of the power supply, and the cutting line is in contact with the conductive block to form a tool electrode.

In some embodiments of the present application, a conductive wheel is further formed on the frame, and is connected to the negative electrode of the power supply, and the cutting wire is wound on the conductive wheel to form a tool electrode.

In some embodiments of the present application, the cutting device further comprises a tensioning assembly, which includes an adjusting member and a tension pulley connected to the adjusting member, wherein the cutting wire is wound on the tension pulley for adjusting tightness of the cutting wire.

In some embodiments of the present application, the cutting platform includes a first supporting member fixed on the base and a second supporting member movably connected to the first supporting member, the second supporting member is movably connected to a workpiece support, and the moving directions of the supporting stand and the second supporting member are perpendicular.

In some embodiments of the present application, the workpiece is horizontally connected to the workpiece support through a clamp, the clamp is directly connected to the positive electrode of the power supply, and a rotary driving member is formed on the workpiece support and used for controlling the clamp to rotate.

In some embodiments of the present application, the second support member is connected to the feeding driving member, the first support member has a first guiding portion formed thereon, and the bottom of the second support member has a second guiding portion formed thereon and adapted to the first guiding rail.

In some embodiments of the present application, the workpiece support is connected to the feeding driving member, the second support member has a third guide portion formed thereon, and the workpiece support has a fourth guide portion formed thereon and adapted to the third guide portion.

In another aspect, the present application also relates to a wire cutting method, which includes any one of the above wire cutting devices, and specifically includes the following steps:

placing the workpiece on the cutting platform; the workpiece is rotated on the cutting platform about its own axis;

the cutting line is connected with the negative electrode of the power supply to form a tool electrode, and the workpiece is connected with the positive electrode of the power supply to form a workpiece electrode;

and controlling the cutting assembly to move, and generating relative motion between the tool electrode and the workpiece electrode which rotates automatically to cut the workpiece.

Compared with the prior art, the invention has the advantages and positive effects that:

according to the wire cutting device, the cutting wire is connected with the negative electrode of a power supply to form a tool electrode; the workpiece is connected with the positive electrode of a power supply to form a workpiece electrode, electric discharge machining is added on the basis of mechanical cutting of a cutting line, abrasive particles of the electroplated diamond line are self-sharpened, more abrasive particles participate in cutting, the continuous sharpness is kept, the macroscopic acting force of a cutting process is favorably reduced, the cutting line bow is improved, the machining precision is favorably improved, residual materials of line mark wave crests are removed by applying the electric discharge etching effect, the improvement of the surface waviness is facilitated, and meanwhile, the uniform processing of the surface profile distribution is facilitated;

the workpiece can rotate on the cutting platform, and the contact between the cutting line and the workpiece is changed from the existing line contact into point contact in a rotary cutting mode, so that the contact force is greatly reduced, the processing quality of the truncated end face is improved, and the processing time is shortened.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of one embodiment of a wire cutting apparatus according to the present invention;

fig. 2 is a front view of the wire cutting apparatus proposed by the present invention;

fig. 3 is a side view of the wire cutting apparatus proposed by the present invention;

fig. 4 is a plan view of the wire cutting apparatus according to the present invention;

FIG. 5 is a schematic view of a clamp construction;

FIG. 6 is a schematic diagram comparing rotary cutting and linear cutting of cut surfaces;

FIG. 7 is a schematic view of a combined rotary cutting and electro-discharge machining cutting process;

FIG. 8 is a schematic flow diagram of a wire cutting method;

in the figure, the position of the upper end of the main shaft,

100. a support assembly;

110. a base;

120. a frame; 121. avoiding the mouth;

200. a cutting assembly;

210. a first drive wheel;

220. a second drive wheel;

230. a driven wheel;

240. a conductive wheel;

250. a tension assembly;

260. cutting a line;

300. cutting the platform;

310. a first support member;

320. a second support member;

330. a support stand;

331. a support platform; 332. a clamp; 3321. a jaw;

400. a workpiece;

500. a feed drive;

600. material loading driving piece.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically coupled, may be directly coupled, or may be indirectly coupled through an intermediary. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Moreover, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or configurations discussed.

As shown in fig. 1 to 4, the present application provides a wire cutting apparatus and a wire cutting method, the wire cutting apparatus is an apparatus for cutting a single crystal silicon rod into short rods through horizontal or vertical processing, and specifically includes a support assembly 100, a cutting assembly 200, and a cutting platform 300.

The support assembly 100 is used for providing support for the whole wire cutting device, and specifically comprises a base 110 fixed on the ground and a frame 120 mounted on the base 110.

The cutting mode of the linear cutting device is suitable for two modes of reciprocating cutting and annular cutting, and the linear cutting device can be suitable for a machining structure with a single cutting line as a cutting tool and can also be suitable for a simultaneous machining structure with a plurality of cutting lines.

The cutting assembly 200 may be horizontal or vertical, and in the horizontal state, the workpiece 400 is located on the left side or the right side of the circular cutting line; in the vertical state, the workpiece is positioned on the upper side or the lower side of the annular cutting line.

During the machining process, the relative movement between the workpiece 400 and the cutting assembly 200 may be performed by the frame 120 fixing the workpiece 400, or by the workpiece 400 fixing and the frame 120 moving.

Taking the annular horizontal single cutting line cutting device as an example, an avoiding opening 121 is formed on the frame 120, the avoiding opening 121 is located at the side of the frame 120, and the relative motion between the frame 120 and the workpiece 400 is horizontal.

The cutting assembly 200 includes a cutting wheel assembly rotatably coupled to one side of the frame 120 and a cutting line 260 wound around the cutting wheel assembly.

The workpiece 400 is mounted on the cutting platform 300, and the workpiece 400 is self-rotatable on the cutting platform 300 along its own axis.

The cutting line 260 is connected with the negative electrode of the power supply to form a tool electrode; the workpiece 400 is connected to the positive power supply to form a workpiece electrode.

The workpiece 400 is rotated about its own axis, and the cutting line 260 and the workpiece 400 are connected to the negative power supply and the positive power supply of the high-frequency pulse power supply, respectively, to form a tool electrode and a workpiece electrode.

After the cutting line 260 cuts into the workpiece 400, the high-frequency pulse power supply is electrified to supply power to the workpiece 400 and the cutting line 260 simultaneously to form a pulse discharge loop, and discharge non-contact removal is added on the basis that the cutting line 260 performs rotary cutting removal on the rotating workpiece 400.

When the switch-out position is approached, the power supply is turned off, and the discharge loop is cut off.

The switch of the power supply can be controlled by an operator, or the switching time of the power supply is controlled by the controller in advance according to the time law of the cutting process, and the cutting is intelligentized and has higher accuracy through the control of the controller

The cutting line 260 cuts the workpiece 400 by adopting an electric discharge machining mode, the surface material of the workpiece 400 is removed by increasing a high-frequency pulse power supply and utilizing the pulse discharge action, and the material removed by the electric spark non-contact material removal mode reduces the macroscopic acting force of a cutting procedure in the whole machining process, so that the cutting line bow is improved, and the machining precision is improved.

The rotary cutting is combined with the electric discharge machining, the workpiece 400 is subjected to composite truncation, the truncation efficiency of the workpiece can be greatly improved, and the machining precision and the machining quality are improved.

There are various connection ways of the cutting line 260 and the power source cathode, in some embodiments of the present application, the power source cathode is electrically connected to any cutting wheel in the cutting wheel set, and then the cutting line 260 is electrified in the process of passing through the cutting wheel set to form a tool electrode.

In addition to the above connection manner, in other embodiments of the present application, a conductive wheel 240 or a conductive block may be additionally disposed on the frame 120, and the conductive wheel 240 or the conductive block is connected to the negative electrode of the power supply.

The cutting line 260 is electrically charged through the conductive wheel 240 or conductive block to form a tool electrode.

The workpiece 400 is connected to the positive electrode of the power supply through the clamp 332, and a conductive pulley or a suction cup can be added to the end surface of the clamping end of the workpiece 400 to achieve conductivity.

The cutting wheel set comprises a plurality of cutting wheels, wherein at least one driving wheel is included, the driving wheel is externally connected with a cutting driving part such as a motor, the cutting driving part drives the driving wheel to rotate, and power is provided for the movement of the cutting line 260.

The number of the driving wheels is at least one, and certainly, two or more driving wheels may be provided, and when the number of the driving wheels is two, the first driving wheel 210 and the second driving wheel 220 are preferably disposed on both sides of the avoiding opening.

In some embodiments of the present application, the cutting wheel set further includes a driven wheel 230 in addition to the driving wheel, and may also include at least one driven wheel 230, the driven wheel 230 is rotatably connected to the frame 120, and the number of the driven wheels 230 is not limited.

The workpiece 400 is mounted on the cutting platform 300, and relative movement is generated between the frame 120 and the cutting platform 300, and the cutting line 260 corresponding to the position of the escape opening 121 forms a cutting segment.

During the relative movement of the workpiece 400 and the cutting platform 300, the workpiece passing through the avoidance opening 121 is cut by the cutting line 260 moving at a high speed.

The cutting assembly 200 is further provided with a cooling system for spraying cooling liquid to the cutting area corresponding to the avoidance port 121.

In some embodiments of the present application, the frame 120 and the base 110 are fixed to each other, and the cutting platform 300 moves relative to the frame 120.

Specifically, the cutting platform 300 includes two motions, i.e., a feeding motion in a depth direction with respect to the escape opening 121, and a feeding motion for changing a cutting position of the workpiece 400.

The cutting platform 300 specifically includes a first support 310, a second support 320, and a workpiece support, wherein the first support 310 is fixed on the base 110, and the relative position of the first support 310 and the base 110 is fixed.

The second support member 320 is movably coupled to the first support member 310 and the workpiece support is movably coupled to the second support member 320.

Referring again to fig. 1, the work support includes a support stand 330 and a support platform 331, the support platform 331 being disposed horizontally below the support stand 330.

The supporting stand 330 is connected to a clamp 332 for connecting the workpiece 400, the clamp 332 is connected to a rotary driving member (not shown), and the clamp 332 and the workpiece 400 rotate under the driving of the rotary driving member.

Referring to fig. 5, in detail, a plurality of jaws 3321 are formed on the jig 332, and one end of the workpiece 400 is fixed by the jaws 3321.

After the rotary driving element is turned on, the clamp 332 and the workpiece 400 both perform self-rotation motion along the axis of the workpiece 400 to perform rotary cutting.

Referring to fig. 6, in comparison with the conventional cutting line 260 which needs to penetrate through the whole cross section of the workpiece 400, the cutting line 260 only needs to cut through the center of the workpiece 400 during the rotary cutting process to realize the truncation of the workpiece 400, and the cutting time is theoretically half of that of the conventional cutting method.

In addition, the point contact processing mode of the rotary processing optimizes the material removal effect of the cutting contact area, is beneficial to reducing the cutting force of unit materials and improving the processing precision, and realizes the finishing processing of the abrasive particles to the section surface of the workpiece 400 by utilizing the multiple contact of the cutting section and the cutting line 260.

Referring to fig. 7, the cutting line 260 performs discharge composite rotary cutting, and the workpiece 400 is driven by the second supporting member 320 and the workpiece holder to be fed into the cutting area corresponding to the avoiding opening 121.

After the cutting line 260 cuts into the workpiece 400, the high-frequency pulse power supply is powered on, and meanwhile, a pulse discharge loop is formed through the workpiece electrode and the tool electrode, so that a discharge removal action mode is added on the basis of rotary cutting removal of the diamond wire.

When the cutting line 260 cuts the workpiece 400 to the position near the cutting position, the discharge circuit is closed, and the workpiece is cut by the cutting line 260.

The direction of movement of the second support 320 relative to the first support 310 coincides with the feed movement for bringing the entire cutting platform 300 closer to or further away from the cutting line 260.

The moving direction of the workpiece holder with respect to the second supporter 320 coincides with the feeding movement for changing the cutting position of the workpiece 400.

The second support member 320 is connected to the feed drive member 500, and the workpiece stand is connected to the feed drive member 600.

The form of the infeed drive 500 and the loading drive 600 may be various, such as an electric push rod arrangement, etc.

The structure of the feeding driving member 600 and/or the feeding driving member 500 may also be a driving motor and a screw rod structure, and correspondingly, threaded holes adapted to the screw rods are formed on the supporting platform 331 and/or the second supporting member 320, and the movement of the second supporting member 320 and/or the supporting stand 330 is realized under the action of the threaded fit along with the rotation of the screw rods driven by the driving motor.

In order to improve the intellectuality of cutting process, improve the machining precision, rotatory driving piece, feeding driving piece 500, material loading driving piece 600 and power all are connected with the controller, and the on-off time of each switch spare is predetermine according to the processing law to the controller, in addition, can also adjust the cooperation position of rotatory processing and discharge machining process according to actual processing demand, obtain different application effect, the advantage of compound cutting of performance, realize the stack optimization.

In order to ensure the accurate moving process and prevent the generation of misalignment, a set of guide assemblies is respectively arranged between the first support 310 and the second support 320 and between the second support 320 and the workpiece support.

Specifically, a first guide portion is formed on the first support 310, and a second guide portion adapted to the first guide portion is formed on a side of the second support 320 contacting the first support 310.

Similarly, a third guide portion is formed on the side of the second support member 320 contacting the workpiece holder, and a fourth guide portion adapted to the third guide portion is formed on the support platform 331.

Supporting platform 331 is horizontal supporting bench structure, supports grudging post 330 below and fixes on supporting platform 331, and the third guide part setting is in supporting platform 331 bottom to improve the area of being connected with second support piece, improve stability.

In some embodiments of the present application, in order to adjust the tension of the cutting line 260, a tensioning assembly 250 is further disposed on the frame 120, which specifically includes an adjusting member and a tension pulley connected to the adjusting member, and the cutting line 260 is wound on the tension pulley.

The adjusting member can be various, such as a heavy hammer, a linear tension such as a spring or a linear motor, a swing rod type tension such as a tension swing rod, or an eccentric wheel type structure such as an eccentric wheel or a lever.

The specific design of the tension assembly 250 is not a design focus of the present application and will not be described further herein.

Referring to fig. 8, the specific cutting steps of the wire cutting method are as follows:

s1: fixing one end of the workpiece 400 to the jaw 3321 of the jig 332;

s2: after the cutting line is adjusted to the proper cutting tension, the cutting driving part is started through a controller or manually, and the cooling liquid is started.

S3: the control cutting line is connected with the negative pole of the power supply to form a tool electrode, and the workpiece 400 is connected with the positive pole of the power supply to form a workpiece electrode.

S4: the controller controls the rotary driving element to be opened, and the rotary driving element drives the workpiece 400 to rotate automatically.

S5: the controller controls the feed driving member 500 to be turned on to drive the second supporting member 320 to move in a direction close to the cutting assembly to cut the workpiece 400, and the controller can turn off the power supply connected to the tool electrode and the workpiece electrode at any time according to actual cutting requirements during the cutting process.

S6: the rotational speed of the workpiece 400 and the speed of the cutting line 260 are maintained constant, and the controller controls the feeding driving member 500 to rotate reversely to drive the second supporting member 320 to reset, so that the cutting line 260 is withdrawn from the workpiece 400.

S7: the controller controls the cutting driving part and the rotating driving part to be closed, and the cooling liquid is closed.

S8: the cut workpiece 400 is taken away, if the cutting is completed, the rest of the workpiece 400 is taken away from the clamp 332, and if the cutting is not completed, the loading driving member 600 drives the supporting platform 331 to drive the workpiece 400 to be fed forward to the next processing position.

In the cutting apparatus according to the present application, the workpiece 400 is in a rotating state during the cutting process by the cutting line 260, that is, the workpiece 400 is cut by a rotary cutting method, and simultaneously, the workpiece 400 is cut by electrical discharge between the tool electrode and the workpiece electrode by using pulse discharge.

The tool electrode and the workpiece electrode interact, residual materials of line mark wave crests can be removed by applying the discharge etching effect, the surface waviness is improved, the uniform processing of surface profile distribution is facilitated, the self-sharpening of abrasive grains of the electroplated diamond wire is realized, more abrasive grains participate in cutting, the continuous sharpness is maintained, the macroscopic acting force of a cutting process is reduced, and the improvement on the cutting line bow and the improvement on the processing precision are beneficial.

The point contact processing mode of the rotary processing is greatly reduced compared with the full chord length of the traditional mode, the silicon rod can be cut off only by cutting the center of the silicon rod, and the cutting time is only half of that of the traditional mode theoretically.

The rotary machining optimizes the material removing effect of the cutting contact area, is beneficial to reducing the cutting force of unit materials and improving the machining precision, and can realize the polishing machining of the cutting section by abrasive particles by utilizing the multiple contact of the cutting section and the diamond wire.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention, and therefore, the scope of the present invention shall be subject to the claims.

Claims (10)

1. A wire cutting apparatus, comprising:

the supporting component comprises a base and a rack arranged on the base, and an avoidance port is formed in the rack;

the cutting assembly is connected to the base and comprises a rack and a cutting wheel set for winding a cutting line to cut a workpiece, and the cutting wheel set is rotatably connected to one side of the rack;

the cutting platform is used for connecting a workpiece, and a rotary driving piece is further arranged on the cutting platform and used for driving the workpiece to rotate around the axis of the workpiece;

wherein, the cutting line is connected with the negative pole of the power supply to form a tool electrode; the workpiece is connected with the positive electrode of the power supply to form a workpiece electrode;

when rotary cutting is needed, the workpiece is controlled to rotate automatically, and rotary cutting is formed between the cutting line and the workpiece; and/or

When the electrified cutting is needed, the power supply is controlled to be turned on, and the electrified cutting is formed between the cutting line and the workpiece.

2. The wire cutting device according to claim 1,

the power negative pole with the cutting wheelset is connected, the cutting wire is around the cutting wheelset, forms the tool electrode.

3. The wire cutting device according to claim 1,

and a conductive block is formed on the rack, the conductive block is connected with the negative electrode of the power supply, and the cutting line is contacted with the conductive block to form a tool electrode.

4. The wire cutting device according to claim 1,

and a conductive wheel is also formed on the frame and connected with the negative electrode of the power supply, and the cutting wire is wound on the conductive wheel to form a tool electrode.

5. The wire cutting device according to claim 4,

the cutting device is characterized by further comprising a tensioning assembly, wherein the tensioning assembly comprises an adjusting piece and a tension pulley connected with the adjusting piece, and the cutting wire is wound on the tension pulley and used for adjusting the tightness of the cutting wire.

6. The wire cutting device according to claim 1,

the cutting platform comprises a first supporting piece fixed on the base and a second supporting piece movably connected to the first supporting piece, a workpiece support is movably connected to the second supporting piece, and the supporting vertical frame is perpendicular to the moving direction of the second supporting piece.

7. The wire cutting device according to claim 6,

the workpiece is horizontally connected to the workpiece support through a clamp, the clamp is directly connected with the positive electrode of the power supply, and a rotary driving piece is formed on the workpiece support and used for controlling the clamp to rotate.

8. The wire cutting device according to claim 6,

the second support piece is connected with the feeding driving piece, a first guide part is formed on the first support piece, and a second guide part matched with the first guide rail is formed at the bottom of the second support piece.

9. The wire cutting device according to claim 6,

the workpiece support is connected with the feeding driving piece, a third guide part is formed on the second supporting piece, and a fourth guide part matched with the third guide part is formed on the workpiece support.

10. A wire cutting method comprising the wire cutting device according to any one of claims 1 to 9, comprising the steps of:

placing the workpiece on the cutting platform; the workpiece is rotated on the cutting platform about its own axis;

the cutting line is connected with the negative pole of the power supply to form a tool electrode, and the workpiece is connected with the positive pole of the power supply to form a workpiece electrode;

and controlling the cutting assembly to move, and generating relative motion between the tool electrode and the workpiece electrode which rotates automatically to cut the workpiece.

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